Mining machine



M. P. HOLMES June 16, 1931.

MINING MACHINE Original Filed OCC. 29, 191'?A 2 Sheets-Sheet l M. P. HOLMES MINING MACHINE June 16, 1931.

Original Filed Oct. 29, 1917 2 Sheets-Sheet 2 T1/c vena? Ha rlez'sPH Zn s. *ZJ

Patented `lune 16, 193i NITED STATES 15S-MM5 PATENT OFFICE MORRIS P. HOLMES, 0F CLAREMONT, NEWEALVIPSHRE, ASSIGNOR TO SLLVAN MA- CHINERY COMPANY, A C'R-EORATION OF I'y-IASSACISETTS MINING MACHINE Application filed October 29, 1917, Serial No. 199,053. Renewed Uctober 10i, 1929.

machines are utilized adapted to travel upon rails to thewall of the entry and having a forwardly extending horizontal cutter bar disposed in a plane above the level of the rails and movable about an axisv located in 1;, the centerline of the truck. In the operation of this system, the bar is angled relative to the track and 1s, first, advanced into the coal by a rectilinear movement; second, swung f acrossin the sameV transverseplane; and, s third, retracted when disposed at the opposite side of the machine at an angle relative to the track corresponding to the first angle. I-Iowever, with such a machine it has been impossible to make the cutting mechanism operate on the bottomV of the entry,

due to the interference of the track, and the rresulthas been. that in those operations un- .cut coal to the depth of siX or eight inches,

i. e. the height of the track, has been left in a substantially solid mass beneath the kerf,

even after the coal has been shot, thereby contributing so largely to the difficulties in the way of cost and delay incident to the use of this system asfto be prohibitive under ordinary conditions, and especially so when labor is scarce and available only at a price.

My invention has for its object to drive v a mine entry inl an improved manner whereby the bottom of the kerf may form a conf tinuation of the plane of theentry bottom.

A further object of my invention is to provide improved mechanism whereby theoperation of removing the coal from an entry may be facilitated and the delay and cost of entry driving decreased, through the use of improved means whereby the machine may cut its kerf not only in the plane of the entry bottom, but'across the end of the rails. A more specific object of my invention is to provide anV improved entry driving mechanism whereby itis made possible to undercut the material of the entry on a level with the entry bottom in such a manner that all the coal may be shot and removed in 4one operation, all necessity for a separate operation of.

removing any layer of coal above the bottom being eliminated. I attain these objects by an apparatus operating in accordance with an improved method whereby the cutter bar is enabled to operate on the same level as the bottom of the entry and in a path across the end of the track and in advance of the machine.

In the accompanying drawings, I have, for purposes of illustrating the principle of my invention, shown one embodiment which the same may assume in practice, illustrating the same as applied to a machine of the well known arc-wall type.

In these drawings, y y Fig. 1 is aplan view of my improved ma; chine, the parts being shown in one of the transport positions. I

Fig. 2 is a side elevation of the construc-| tion shown in Fig. l.

Fig. 3 is a simplified diagrammatic view showing the machine in position to make its sumping cut. l

Fig. 4 is a similar, view showing the machine after completing its sumping cut.

Fig. 5 is a similar view showing the machine after the completion of its transverse cut.

lT'g. 6 is ay similar view 'showing the ma chine adjusted into position to beginV its withdrawal cut. y

Fig. 7 is a similar view showing the machine after the completion of its withdrawal cut, another transport position being shown in dotted lines.` y Fig. -8 is a similar view showing the machine in use as a long-wall machine.

In this illustrative disclosure, it' will be noted that the machine includes a truck frame l rigidly supported upon suitable wheels 2 which are adapted to runupon the track 3 and be driven from suitable propulsion means. Herein, the power for driving these wheels is derived from a suitable motor 4c mounted on the truck and operatively connected through gearing 5 to truck driving mechanism' 6 including' a transverse truck shaft at the rear of the truck, the motor being kcontrolled through a suitable controller 7 and the rotationof the shaft being` con connected through trolled through a suitable clutch and brake 8 of the usual reversible type whereby the movement of the truck may be controlled and reversed in a well known manner. Car ried upon the truck it will also be observed that 1 have shown a reel 9 adapted to wind or unwind a cable 10 connected to the motor and thus supply7 current to the latter duri: transport.

Thus, it will be evident that means are provided whereby tl e truck 1 may be reciprocated at will back and forth rela tive to the track 3,

Carried upon the truck 1 is a rotatablmember 11, which may assume vai-lou.e forms but is herein shown as substantially circular in form and mounted upon suitabl supports 12 and 18, non-rotatably moua', t.. upon the iront end of the truclf; l and counected by adjusting the screws 14 in such a manner that the height of the member 11 may be adjusted as desired. shown, the element 12 tor-ins a table-li support on which the member 11 is jourualed, and this member 12 is providedwith depending portions adapted to cooperate with a plurality of screws 14 rotatably mounted in port 13 and disposed at a pliuality o1PA po beneath the member 11 in such a manner to furnish stable support therefor, three of these points of support being shown h.

As illustrated, the screws lll are also connected with power mechanism i*h manner that the height or" the meneer 12, and therefore of the member 11 carried thereon, may be varied as desired, the ir aus for adjusting the saine being shown herein as including a plurality ot sgrirockets 15 earried on the lower end ot the screws and cennected through a suitable chain to a sprocket; 17 carried ou a vertical shaft 18 at the rear of the truck i. and in turi connected through beveled gearing 19 to a shaft 2O ro".i nectible at will with the shaft 6 through s 'able clutch mechanifV-:m

A 1 shown herein as cast integral with the ein ber 11. As shown, the sprocket 24; is connected to a suitable upstanding shaft 2G journaled in the support 25, which in turn carries a sprocket 2? on its upper end connected through a rearwardly extending chain 28 to another sprocket 29 disposed over the axis of the rotatable member 11 and suitable transmission mechanism to a suitable source ot power.

As shown, the power for rotating the chain 23 is supplied from a suitably controllable motor 30 carried on the under side of the rotatable member 11 and connected through suitable transmission mechanism 31, 32, 33, and 34 with the sprocket 29 whenever a clutch 35 is adjusted into operative position to connect the idler member 32 to its shaft 33.

.As shown, means are provided herein whereby the angular position of the rotatable member 11 may be varied as desired, preferably by power means. These means, as shown, include a gear 36 meshing' with the idl r gear 32 and carried upon a transverse shaft 37 which in turn connect-ed through beveled gearing with a 'rotating drum 39 carried on the top oft' he member 11 and adapted to wind up cable or suitable flexible member 4.0 passing around suitable sheaves 4:1 disposed around the periphery of the member 11 and having its free end connected, snown at 4t2, to the stationary truck member 1. rllhus, obviously, power may be supplied from the motor 30 to wind and unwind the drum and thereby vary the angular position ot the member 11. t will also be noted that through a suitable ustable friction clutch l?) of any well know form, herein oit the hand-wheel type and carried within the drum, the connection oi thi drinn to the power shaft 3? may be varied desired, and that through the provision oit a locking member 411- carried on the sup port 12 and adapted to be received in any one of a plurality ot notches 45 formed in the edge ot the member 11, the latter may be locked in any desired angular position.

Thus, it will be observed that the machine may be moved bodily back and forth when desired, along the rails 'through the operation of the motor el. and the coni'iection oi the latter to the truck wheels; that the cutter chain 23 may be operated when desired trom the motor o0 through theconnections between these elements including the chain 28; that the heivht of the rotatable member 11 and the cutter bar may be varied as desired through the operation ot the connection between these elements inchuiling the ch ain and sprocket connection 1'?, 1G, 15; and l at the angle of the member 11 may be adjusted when desired through the power connections including the iieiible connection 40 and the controlling members therefor. It will also be evident that through the pro* vision of the several clutch mechanism the various mechanisms may be operated in any sequence desired.

ln the form oi my improved construction shown herein, it will be noted that the cuts ter bar 22 may be so adjusted relative to the rotatable member i1 as to enable the bar to be lowered into position to cut at one side ot the rail l) and on the same level as, i. e; flat upon, the bottom of the entry. lt-will also may be thusinserted asa continua bottom.

tact that the line-chainsm may be operated be observed that means are provided where# by after the bar is so disposed the same may be swung in the same plane across the frontend ofthe rails 3 and thereafter caused to its support 25, and that through the pro-I visionoi' suitable adjusting means the same is adapted'to be adjusted into various operative positions angularl-y with respect to this f support. These means may obviously assume various forms, but as shown the same comprise a laterally extending arm 4:6 operatively connected to the bar 22 througha suitable sleeve l? surrounding thev shaft- 26, and a cooperating pin 4:8 adapted to be received in a plurality of suitable apertures 49, 50, 51, 52, and 53, in a forwardly and, herein, laterally extending plate 54 connected tof the trent end of the rotatable member ll. Thus, it will be noted that not only may the angular positiony ot the bar he adjusted by lrotation oi the rotatable member ll when the bar is locked in any given position thereon, but that, through this adjustment' and the lowering mechanism 15, 1G, the position oit the bar 22 relative to this member ll and the truck may be so adjusted as to enable the bar to be swung laterally iii-such a manner y that the chain 23 maycut on the bottom either side of the rails and, when the ma.- y

chine is located at the end ot the rails, transversely across beyond the front of the latter.- It will also be observed that the location oit the hert is controllable by the adjusting mechanism l5, 16 so that the lrert y tion ot the bottom or at any desired height above the Attention is' also directed to the in the usual manner and without vthe use ot this adjustment whenever it is desired to cut out a korf above the bottom level.y

rlhe operation ot my 'improved mechanism y will'be more clearly understood from a cone sideration ot Figs. 3 to 7, wherein themachine is illustrated diagrammatically in the various positions which it will assume during' the operation oi' under-cutting an entry on the level of the entry bottom. During the transport of the machine about the mine, the parts may, it desired, obviouslyoccupy the position shown in Fig. l. lll/when, however, the machine has been moved into the entry until the end of the bar is closely adjacent the tace, the parts are then adjusted into the position shown in Fig. lirthisposition, it

will be noted that the truck is not run quite to the end oi the rails 3, and thatthe bar is .swung to the right and flexed relative to f the member ll which also has beenturned to level ot the entry bottom.

fing holes.

the right. Preferably, this adjustment is made before the cutter bar is started in operation andafter the pin 48 has been removed, by means of the power driven flexible con-- neet-ion l() which acts to. swing the member l1 and the bar to the right until the en d of the latter is brought against the right hand wall or rib of the entry in such a manner as to flex the pivotal connection between the bar 22 andthe rotatable element ll until the parts assume the'position shown in Fig. 3. 'ln this position it will be observed that the pin 4S may be readily inserted in registering openings. is then so disposed at the outside of the right hand rail 3 that it may be lowered upon the bottomby a. suitable oper-ation ot the adjusting screws lll, and that the bar is then rigidly connected to the truck in such a manner that when the cutter chain is started in operation and the entire truck l reciprocated f forward trom the position shown inV Fig. 3 to the position shown in Fig. i,`the bar may be readily sumped innnder the coal on the ln this position, i. e. that shown in Fig'. e, wherein the truck has been moved forward to the. extreme end ot the rails, the truck is maintained stationary by any 'suitable means, as for instance through the reaction of the gear 5 or the use oi other suitable means to hold it during the making of the transverse cut. With the parts in this position, this cut may then, obviously, be made across from the position' shown in Fig. l tothe position shown in Fig'. 5 by simply ope-rating the iiexibile connection 40 in such a manner to canse the rotatable member 1l to be rotated to the .lett relative to its support, the barcuttl o" substantially throughout its lengthv during the greater part of its bodily transversely swinging movement. l/Vhenthe parts reach lt will also be noted that the bar ifi" the end of this transverse cut, i. e. the posil tion shown in Fig. 5, however, it will be notedv that the inner end of the cutter chain would strike the lett hand rail if the cutting' mechaposition shown in Fig. 6, whereupon the pin 48 may be readily dropped into the register- During the cutter chain 23 may bc operated in such a manner as to reduce the amount ot uncut material to the extent shown in Fig. 6, so that cuttin may continue during this movement of the cutter 'ba-r to a point outside thelimits of the left hand rail. 0bviously`, after the arts have reached. the position sho-wn in Fig.

v6 'the same may be readily withdrawn from this operation, obviously,

4 Lemiers the cut to complete the latter by a single rearward reciprocation of the truck l on the track, the parts then assuming the full-line position shown in Fig. 7. lVhen in this position the cutter bar may obviously be raised from the bottom through a. simple operation of the screw 14:, and the same may be swung into the position shown in dotted lines by a simple operation of the flexible connection 40 in order to prepare the mechanism for transport to the next entry to b-e cut, the bar then being so disposed that it-does not interfere with the rea-:ly transport of the machine about the mine. Also, it will be observed that with the bar in this position, when it is again desired to adjust the same into the position shown in Fig. 3 in order te make the first cut in the next entra it is only necessary to remove the pin Li8 and rotate the table 1l to the right in order to flex the pivotal connection by power means and bring` the parts into the position shown in Fig. 3, wherein after he return of the pin and the lowering and starting of the cutter bar the next forward out may be made,

In the use of my improvement, it will be observed that it is possible to extend an entry by cutting continuously upon the same level and without leaving any uncut portions to be removed before the track can be again advanced, thus greatly reducing the expense in cid'ent to the operation of entry drivingl with known machines, at the same time that the speed of entry drivin is materially increased. By the use of my improved construction it is also possible to drive an entry having str ght ribs, the forward or sumping cut producing a straight right hand rib, while the rearward or withdrawal out produces a straight left hand rib. It will also be observed that by the use of my improved mechanism all various adjustments of the bar may be made by power means, the only labor required of the operator being the simple operation of removing the pin 48 and re-inserting the same after the power means has so moved the elements that the pin-receiving holes are in registry. Attention is also directed to the fact that whenever' desired, my improved machine may be readily adapted to long-wall work,

shown in Fig. 8, by simply swin ng the bar to a osition at i lit angles rel tive to the truck, preferably u nue the cutter bar is operating, and then maintaining the bar in this iosition as the truck is moved alone the wall or face. Obviously, by such arrangement it will be poss'ble to produce a bottom cut extending along the len i of any face so that the machine may be used in either long-wall or room cutting. It will also be evident that by the use of my impro ved construction, the level or angle of the l erf maybe varied witl in any desired limits and that, when desired, the machine may be operated as an ordinary arc-wall machine, the same having` all the advantages thereof at the same time that it is enabled to produce numerous new and improved results not obtainable by such a machine. These and other advantages of my improvement will, however, be clearly apparent to those skilled in the art.-

lVhile I-have in `this application specifically described one embodiment whiclrniy invention may assume in practice, it will be understood that the same is used only as an illustration of the principle of the invention and that the invention itself may assume various other forms without departing from its spirit or from the scope of the appended claims.

lVhat I claim as new and desire to secure by Letters Patent is:

1. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a support mounted on said truck for adjustment bodily vertically rectilinearly relative thereto and for rotative movement about a vertical axis, kerf cutting mechanism on said support including a pivoted cutter bar swingable about a parallel vertical axis and provided with cutting elements moving in an orbit within whose limits the pivot of said bar is disposed, and means, including motor operated devices for adjusting and rotating said support relative to said truck, for disposing said bar in transverse planes beneath the level of the top of the traclway with its pivot at one side of the traclrway, and for positioning said bar substantially above the top of the trackway.

2. In a mining apparatus, a wheeled truck adapted lto run along a mine traclway, a support mounted on said truck for adjustment bodily vertically rectilinear-ly relative thereto and for rotative movement about a vertical axis, lrerf cutting mechanism on said support adapted to cut in spaced horizontal planes and including a pivoted cutter bar swingable about a parallel vertical axis and provided with cutting elements moving in a substantially horizontal orbit, and means, including motor operated devices for adjusting and rotating said support relative to said truck, for disposing said bar in transverse planes beneath the level of the top of the traclzway and wholly at either side of the traclway.

` 3. In a mining apparatus, a wheeled support adapted to run along a mine traclrway, a turntable mounted on said support for rotation about a vertical axis, lierf cutting mechanism mounted on said turntable including an elongated plane kerf cutter pivotally mounted on said turntable to swing about an axis parallel to the turntable axis but spaced therefrom to enable bringing the bar wholly outside the traclrway, means, including motor operated devices for adjusting said turntable vertically relative to the support wheels, for adjusting said kerf cutthe levell of the bottom inadvance of the trackway.

1l. In a mining machine', the combination ywith a self propelling wheel supportedztruck having mechanism for. driving, the wheels thereof to effect truckf propulsion, ot. aturntable. rotatably mounted uponsaid truck and vertically adjustable relative thereto, .an over hanging bracket carried by said turntable, a horizontally,projecting elongated kei-t' cutter mounted upon .said bracket and rotatable thereon in.. horizontal planes, meansto lock said. .korf cutter in eitherotl several positions of angular'adjustment relative. to saidbracket, andl means mounted upon said turntable to actuate thefkerf'cutteriand to rotate. the turnablev as Aand .for .the purpose set forth..

5. In aminingrnachine, the combination with a self-propelling,wheelsupportedtruck having mechanism. for driving, the wheels thereofA to effecttruck propulsion, otfaturlr table rotatably mounted upon said Vtruckand vertically adjustable: relative. thereto ,..anoverlianging downwardly proj ectingbracket carried byl said turntable, a horizontally project .ing elongatedy kerfcutterr mounted upon y the lowerend of said bracket and rotatable there- `on .in horizontal p.lanesmeans to lock.. said korf-cutter in either of several positions, of angular adjustment relative to said. turntable, andh means mount-ed: upon saidturntable to actuatethe.kerffcutter and :to vrotate.

theturntableas and. 'forthe purpose setforth. n 6. ln a, mining mach-ine.the 'combination with itself-propelling wheel .supported truck having` mechanism for. drivingjthe wheelsl thereof to effect truck.propulsion,y of. azturntable rotatably mounted upon saidtruck-.and vertically adjustable relative thereto; an overhangin'g, downwardly'IV projecting,V bracket carried by. said turntablal'.ahorizontally projecting .elongated kert-cutter4 mounted upon the lowerA endnolf' said" bracket .an-dro.- tatable thereon in horizontal planes, means to'lock said kerk-cutter ineither ot several position-s of angular adjustment,, meansI mounted upon said turntable to'actuatefthe kercutter: and to. rotate thev turntablaan d ineans'to lock the turntable. j

7'. In a mininginaehin'e,.the combination with a self-propelling wheel. supportedtruck having mechanismico-iv dri-'ving the. wheels thereai".V to effect truck prop.ulsion,..of ra-sgup- Y porting memberrot-ata-bly.mounted upon said end ot' Y truck. and` turn-table iii-,horizontal planes and bodily. vertically adjustable relative to the truck-wheels, a radially and downwardly extending bracket carried by said supporting member, ahorizontally projecting elongated f tert cutter mounted upon the lower vand outer said bracket and pivotable.thereon and rel tive thereto in horizontal planes, means-to Vlock saidikerf cutter in either. of several posi.-

tions of angular adjustmentrelative. to..said bracket,l and motor-operated means to actu.- ate the kerf cutter andtorotate the'rotatably mounted supporting, member and to teedtlre truck. during cutting.

f 8. In a mining machine, the combination 180 of afwheeled track guided .truck providinga base arranged in. lined relation to the axes vof the wheels, a vertically pivoted'.trameinember mounted above said base, supporting means for the latter permitting bodily vertical adjustment thereof relative to said base, anv arm projecting from said:vertically pivoted trame member and provided with a depending bracket', and cutting mechanisinfindepending bracket on said arm, driving means for said cutter bar including a vertical shaft disposed in said bracket, a moto-r o-n said trame, and driving yconnections between said shaft and motor, ,said parts beingcon ber mounted above said base, supporting meansf'or the. latter permitting bodily vertical adjustment'thereof relativeto said base, an arm projecting; from .saidvert-ically pivoted frame member and supporting a depend- 1 ing bracket, and cutting mechanism including a pivoted cutter bar pivoting on said depending. bracketon said arm', driving-means'for vsaid cutter bar including a vertical shaft disposed in said bracket, a motor on said cluding a pivoted cuttery bar pivotingon said ythe wheels, a-Vvertically pivoted frame memw trame, and driving connections between y said shaft andk motor, said parts being constructed and arranged to permit said bar to bev lowered tothe. bottom upon which a track guiding the truck wheels is-.posi-L` tioned, and a motor separate from saidtir'st mentioned motor for` effecting such lowering and the raising ot the bar, `the distance between the axis-of said vertical'shaft andthe axis of said pivoted trame bei-ng. substantiallyf` more than one-halt the width of such trackway` whereby said bar may lie flat on thefbottom outside the trackway. j

lO. in a mining machine, the. combination with a wheeled trackguided truck yproviding a base, a turntable mounted thereon and including a ring adjustable vertically relative to said base but held against rotary movement with respect thereto, a rotatable turntable element supported and guided by said ring and rotatable on a vertical axis passing through the center oi said ring, a cutter bar supported by and pivotally mounted relative to said rotatable turntable element to swing about an axis parallel to but oiilset trom the axis of the turntable, said axis of bar swing falling outside said ring, means or locking said bar in a plurality of predetermined angular positions relative to said turntable and said turntable in a plurality of predetermined angular positions relative to said base, and a motor operative to vertically adjust the ring.

11. In a mining machine, a truck adapted to run upon a track, cutting mechanism thereon including a pivoted critter' bar provided with cutting elements moving in an orbit within which the pivot of the bar is disposed, and means for supporting the bar and p rmitting the same to be disposed in a transverse plane beneath the top of said track with its pivot at one side of said track including a vertically adjustable bar supporting mechanism including a vertically rectiu linearly reciprocable member atlording a bearing and a bar supporting member mounted in said bearing for rotation on a vertical axis, and a motor for e'ecting vertioal adjustment of said last mentioned elements and feeding of said machine.

12. In a mining machine, a wheeled truck movable over a trackway, a horizontal turntable mounted thereon, cutting mechanism carried by said turntable and including a cutter bar having circulating cutting elements and .pivoted to swing about an aXis offset from but parallel to the axis oit rotation of said turntable, means ior holding said cutter bar in different horizontal angular positions relative to a straight horizontal line intersecting the pivotal axes oi the bar and of the turntable, actuating means for said cutter bar operative to eiieect circulation of said cutting elements including a motor mounted on said turntable and driving connections between the same and said 'cutting elements, and motor operated means for adjusting said bar vertically rectilinearly between positions wherein the bottom of the horizontal keri' cut thereby will constitute a continuation of the surface upon which the trackway is mounted and wherein the bottommost points of the bar and cutting elements will be above a horizontal plane above the topof the track.

13. In a mining machine, a wheeled truck movable over a trackway, a horizontal turntable mounted thereon, cutting mechanism carried by said turntable and including a cutter bar having circulating cutting elements and pivoted to swing about an axis offset from but parallel to the axis of rotation o1" said turntable, means for holding said cutter bar in dierent angular positions relative to a straight horizontal line intersecting the pivotal axes of the bar and of the turntable, actuating means `tor said cutter bar operative to effect circulation of said cutting elements including a motor mounted on said turntable and driving connections between the same and said bar, and motor operated means for adjusting said bar vertically rectilinearly between positions wherein the bottom of the horizontal kerf cut thereby will constitute a continuation of the surface upon which the track along which the truck runs is mounted, and wherein the bottommost points of the bar and cutting elements will be above a horizontal plane above the top of the track, and motor driven driving means for said truck wheels.

14;. In a mining machine, a wheeled truck movable along a trackway, a horizontal turntable mounted thereon, cutting mechanism carried by said turntable and including a cutter bar having circulating cutting elements and pivoted to swing about an axis offset from but parallel to the axis of rotation of said turntable, means for holding said cutter bar in dierent angular positions relative to a straight horizontal line intersecting the pivotal aXis of the bar and of the turntable, actuating means for said cutter bar operative to effect circulation of said cutting elements including a motor mounted on said turntable and driving connections between the same and said bar, motor operated means 'for adjusting said bar vertically rectilinearly between positions wherein the bottom of the Vhorizontal cut thereby will constitute a continuation of the surface upon which the track along which the truck runs is mounted, and wherein the bottommost points of the bar and cutting elements will be above' a plane above the top of the track, motor driven driving mechanism for said truck wheels, and a common motor for ei'ecting driving of the truck wheels and eecting the yertical adjustment of the cutter bar speci- 15. In a mining machine, a wheeled truck movable along a trackway, a horizontal turntable mounted thereon, cutting mechanism carried by said turntable and including a cutter bar having circulating cutting elements and pivoted to swing about an axis offset from but parallel to the axis of rotation of said turntable, means for holding said cut-ter bar in diiierent angular positions relative to a straight vhorizontal line intersecting the pivotal axes of the bar and of the turntable, actuating means tor said cutter bar operative to eifect circulation of said cutting elements including a motor mounted on said turntable and driving connections between the same and said bar, and motor operated means for moving said turntable vertically rectilinearly to bring saidbar into positions wherein the bottom ot the horizont'al ker cut thereby will constitute a continuation of the surface upon which the track along which the truck runs is mounted and wherein the bottommost points of the bar and cutting elements will be above a plane abov the top of the the track. Y v

16.' In a mining machine, a wheeled truck movable along aI trackway, a horizontal turntable mounted thereon, cutting mechanism carried by said turntable and includingl a cutter bar havingk circulating cutting .elements and pivoted' to swing about an axis offset rfrom but parallel to the axis o rotation of said turntable, means for holding said cutter bar Ain different angular positions relative to a straight horizontal line intersecting the pivotal axes'of thebar and of the turntable, actuating means for said cutter bar operative to eiect circulation ol said cutting elements including a motor mounted on said turntable and driving connections between the sameand 'said bar, a second motor, means operated thereby for adjusting said bar vertically rectilinearly between positions wherein the bottom of thc horizontal kerf cut thereby will constitute a continuation of the 'surface upon which a track along which the truck runs is mounted,

and wherein the bottommost points fof the bar and cutting elements will be rabovea plane above the top of the track, and means operated by said iirst mentioned motor. for changing the angle ot said bar to a. working face.

17. In a mining machine, va wheeledl truck movable along a trackway, horizontal turntable mountedjther'eon, cutting mechanism carried byzsaid turntable and including cutter bar having circulating cutting elements and pivoted to swing about an axis offset `from but parallel to the axis, of rotationv ot said turntable, means `for holding said cutterV bar in differenthorizontal angular positions relative to a straight horizontal line intersecting the pivotal 'axes of thc bar and of the turntable, actuating means for said cutter bar operative Ytov etiect` circulation 'of said cutting elements including a motor mounted on said turntable and driving connections between the same and said bar, a second motor, means operatedthereby 'for adjusting said bar vertically rectilinearly` between positions wherein the bot-tom of thehorizonta-l kerfcut thereby will constitute a continuation ot' the surface upon which the track along which the truck runsis mounted and wherein the bottommost points oi: the bar and cuttingelements will be above a plane above the top of the track, and said bar being disposable onthe bottom wholly outside the track and making a less angle with the track than the angle between said horizontal straight line and the line of the track. y i

18. In a mining machine, the combination of a wheeled track guided truck providing a base arranged in fixed relation to the axes of the wheels, a vertically pivoted traine mounted above said base, supporting meansy for the vlatter permitting vertical adjustment thereof relative to said base, a cutter chain carrying .cutter bar4 member carried by andsaid bar. in diilerent adjusted positions relative to said frame including a plurality ot holes in one of said members, a hole in the other anda pin adapted to be inserted in said holes.

19. Ina mining machine, awheeled truck adapted toi-un upon a track, and cuttingV means supported ,by said truck including an elongated plane cutter-chain carrying cutter bar, a member rotatable upon an axis perpendicular to the plane of said bar and to which said bar is connectible-for swinging at an angular rate the same as that at which -said memberrota-tes on itsaXis, motor oper- Vated means for adjusting said member upwardly and downwardly. relativeV to the truck wheels, motor operatedmeanstor actuating. the cutter chain on said bar in itSv dii'lerent positions resultingA from adjustment upwardly or downwardly-ot said mem-l ber, motoroperated j means Vsupported by said truck'for rotating said member at a cutting speed, and locking means releasible at will for connecting said bar rigidly to said member for swinging thereby or for releasing the bar to permit the same to swing freely relativev to said member.

20. In a mining machine, av wheeled truck adapted to run upon a track, and cutting meanssupported -by saidtruck including an elongated plane cutter chain carryingvcutter bar, a member rotatable upon an axis perpendicular to the plane ofsaidfbar and to which said bar isconnectible for swinging at an angular rate the same as that atwliich said member rotates onits axis, motor operated means for adjusting said member upwardly and downwardly relative to the truck wheels,

motor operated means :for actuating'the cutter chain on saidbar in its different positions resulting i from adjustment upwardly or downwardlyfof said member, motor operated means supported by said truck for rotating said member at a cutting speed, and locking means releasible at'will for connecting sait bar rigidly to said member. for swinging there-by or for releasing the bar to permit the same to swing freely relative-to said member including means f providinga series'oirl ythereto about a vertical axis, said spaced abutment surfaces arranged along anr are struck from the pivotal axis and a looking element inserti?" ment with diiii'erent on s ot said surfaces l hearing a like relation to the cutter bsfr when the latter is locked in diliferent positions.

2l. In a mining apparatus, a wheel supported body adapted to travel along a mine traekway, a trame mounted on said Vlfor horizontal swinging n'xovei ent re thereto about a vertical axis, said 'traine hanging the 1front end of said body, lierf cutting mechanism including` a horizontal pla e hert' cutter pivot-ally mounted on 'the outer extremity o said frame to swing horizontally relative thereto about an axis parallel to said frame axis, said lteri cutter beingadjustable into diilerent elevated positions while the plane ot said lrerif cutter always remains horizontal, motor operated devices for adji-istingsaid korf cutter into the aforesaid elevated positions, said lrerf cutter being adjustable into a position to cut a horizontal kerf at the level oi the mine iloor outside and below the level of the mine traclrivay, and motor operated devices for swinging) said frame about its axis and for Criving 'd cutting mechanism including a motor mounted on and swingable with said frame.

22. In a mining apparatus, a Wheel supported body adapted to travel along;` a mine trackway, a frame mounted on id bodyior horizontal swinging movement relative nrame overhangi the :front end` oit said body, hert cutting mechanism includingl a korf cutter pivotally mounted on the outei` extremity o said frame to swing horizontally relative thereto about an axis parallel to said traine axis, said frame being adjustable in a vertical direction to vary the elevation ofl said korf cutter, motor operated devices for adjusting said frame `in a'hbresaid vertioal direction to position said hert cutter to cut a horizontal kerf at the level of the mine floor outside and beloiv the level oi the mine traekway, and motor operated devicesfor ewingino' s; id frame about its axis andlior driving said cutter meehaniem inbinding.;` a motor mounted on and adjustable with said frame.

223. `In a mining apparatus, a Wheel' supported body adapted to :avel along a mine trackway, a frame mounted on said body .i r horizontal swing-ir mfliveinent relative thereto about a vertical axis, said 'frame overhanging the liront end oit said body, hert cuttingr mechanism including; a` kerl2 cutter pivotally moilnted on the oute oittremity of said iframe to swing horizontally relative thereto about an urns termined ranOfular )ositions about its pivot l relative to said frame, said frame bein.` a justable in af vertical direction to vai, t elevation of lter'i' cutter, motor devices for adjusting ysaid fra said vertical direetion to por" cutter to eut a horizontal hert the :z the mine door outside and belenY the the mine traclway, and motor oper vices for swinging said traine about its Y and 'for driving;` said cutting mechanism i" cluding a motor mounted on and afiljustablo with frame.

In a mining` apparatus, a wheel supported body adapted to travel alone; a mine traclnvay, a horizontal. turntable mounted on said body for rotation relative thereto about a vert-ical axis, a iframe mounted on said turntable and having;` arm portion overhangingv the front end ol said body kort cutting mechanism including a leri` cutter pivotally mounted on the outer extremity oi? said arm portion to swing horizontally relativo thereto about an axis parallel to the turntable axis, said 'turntable being adjustable in a vertical direction to vary the elevation ol said hert cutter, motor operated devices for adjusting said turntable in i toresaid vertical direction to nosition said lrerf cutter to cut a horizontal korf at the level i the mino floor outside and beloi the level fr the mine tra ltway, and motor operated devices 'for Vrotating' said turntable relative to said body and for driving said cutting mech-- anism including a motor mounted on and adjustable With said turntable.

25. Inl a mining apparatus, a Wheel `supported body adapted to 'travel along mine traeliway, a horizontal turntable mounted on said body for rotation relative thereto about a vertical axis, a frame mounted on said turntable and having an arm `portion overhanging' the front end of said bod-y, kerlA cutting mechanism including a leri cutter pivot-ally mounted on the outer extren'iitv ont said arm portion to swing horizontally relan tive thereto about an yaxis parallel to the turntable'axis, said korf eutter being,- freely sivingable about its axis relative to said arm portion, releasible devicesfor locking. said korf cutter in diherent predetermined ingular positionsabout its pivot, said turntable being adjustable in a vertical direction to Vary the elevation of said ker cutter, motor operated devices for adjusting said turn'- table in aforesaid vertical direction to position said lerf cutter to cut a horizontal korf at the level of the mine Hoor outside and below the level of the mine traelnvay, yand motor operated devices for rotatii'ig said turntable relativeto said body and for driving said cutting mechanism includin a motor mounted on and adjustable with said turntable.

In testimony whereof I aliiX my signature` MORRIS P. HOLMES. 

